21971201

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{709}}^1$

素因数の和:968

約数の個数: 16

約数和(自身を含む): 26582400

約数和(自身を除く): 4611199

約数列:

[1, 7, 19, 133, 233, 709, 1631, 4427, 4963, 13471, 30989, 94297, 165197, 1156379, 3138743, 21971201]

約数ペア:

[(1, 21971201), (7, 3138743), (19, 1156379), (133, 165197), (233, 94297), (709, 30989), (1631, 13471), (4427, 4963)]